GT80 Titan SLI bootloops after RAM upgrade

I triple boot Win10, Win10 and Ubuntu Linux. They are respectively on PCIe, PCIe and SATA III 2280 SSD modules.

I had 3x8GB modules of RAM installed. I added one more 8GB to bring RAM to the 32GB total. Ever since then, the machine started bootlooping. I can get to the BIOS if I want, but if I let it directly boot, it goes to the bootloader and then starts the process all over again and never actually boots.

At first I thought it was a problem with the disk, but both Win10 disks do that.

My third disk is the Ubuntu Linux disk and that boots just fine. It sees 32GB of RAM.

BIOS also sees 32GB of RAM. It just does not boot and right after bootloader entry, boots again. I cannot boot Windows by going to the disk selection via F11, however I can boot Linux that way. So there doesn't appear to be anything physically wrong with the machine.

I've seen where this is fairly common and the advice is to reset CMOS. Is that the issue here? Or is there an option in RAM?

I have been down for days, what do I do? I just could not image installing RAM would bring down the machine.

 

I found this procedure. Is this what I need to do? Where is the CMOS button "on the back of the IO panel"? Do I need to take it apart?

https://forum-en.msi.com/faq/article/how-to-clear-the-cmos

 

any thoughts?

 

I dont think it has anything to do with RAM install. I think my bootloader has become corrupt.

 

I booted off the mirror (clone) disk and all is fine.

I have no idea what caused primary disk corruption.